. >>> 150,000 people attend the the formal installation of pope francis. in a distinctive change of style, he didn't use the pope mobile which has bulletproof glass, but was driven through the crowd in an open-air vehicle. >>> this floor fight started after one member gave a speech in russian causing others to boo, which sparked name calling. things really got out of hand. wolf? >> that's politics. unusually tough politics. unusually tough politics. lisa, thanks. -- captions by vitac -- www.vitac.com >>> a killer's t-shirt, a convicted school shooter shows his defiance in his clothes and on his face. >>> an emotional reunion. cnn's dr. sanjay gupta catches up with a united marine whose life he saved in iraq exactly a decade ago. >> i'm brianna keilar in for kate baldwin. >> i'm wolf blitzer. you're in "the situation room." >>> powerful images designed to fire up north koreans and to scare americans. >> strongman kim jong-un has been escalating his nuclear threats for weeks. >> let's go straight to our pentagon correspondent, bar practice starr. she has det